25491452699 has 2 divisors, whose sum is σ = 25491452700. Its totient is φ = 25491452698.

The previous prime is 25491452647. The next prime is 25491452711. The reversal of 25491452699 is 99625419452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25491452699 - 2¹² = 25491448603 is a prime.

It is not a weakly prime, because it can be changed into another prime (25491452629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12745726349 + 12745726350.

It is an arithmetic number, because the mean of its divisors is an integer number (12745726350).

Almost surely, 2^25491452699 is an apocalyptic number.

25491452699 is a deficient number, since it is larger than the sum of its proper divisors (1).

25491452699 is an equidigital number, since it uses as much as digits as its factorization.

25491452699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6998400, while the sum is 56.

The spelling of 25491452699 in words is "twenty-five billion, four hundred ninety-one million, four hundred fifty-two thousand, six hundred ninety-nine".